Malicious PDF — malware analysis report

Static analysis result for SHA-256 2363a8e40fd21c79…

MALICIOUS

PDF

41.3 KB Created: 2020-08-18 13:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7373e9ef8879a533d3f0316b4b2d956a SHA-1: bf1684e39d05bf49e53b7cfd36e0340e24ab45b9 SHA-256: 2363a8e40fd21c7900f2414683698aa6edaa026d082d158350289a004e2b631c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link to a malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body explicitly mentions "bigo live hack apk mod free", indicating a lure to a potentially harmful download or phishing site. The presence of a large number of external PDF links, as flagged by PDF_SEO_LINK_FARM, suggests an attempt to game search engine results for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=bigo+live+hack+apk+mod+free In PDF document text
    • http://kekul.littleblossomsnurseryschool.com/uploads/1/3/1/8/131871674/7219920.pdfIn PDF document text
    • http://sewiz.jillstarlingnovels.com/uploads/1/3/1/0/131070872/c453670faa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1571/4469/files/84763545565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/causes_of_generalized_anxiety_disorder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2042/5115/files/setivugibuxevudukisoxema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6224/8095/files/xaditapivepibonuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8380/0474/files/precious_moments_figurines_value.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8538/0246/files/32163887362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4384/0412/files/25811208540.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/5621/2640/files/amisom_in_somalia.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000632f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632F 5564 bytes
SHA-256: 212eed5f47ef3a8facfa35bf1add78b6375b463ef16bfbb4a37d5c791a1955b0
font_01_sfnt_off000075fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75FD 10024 bytes
SHA-256: 2a552e9023b1407176518960e6a4a27f7719e6043991e706ebc523f5ee95c2d2

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